[galaxy-commits] commit/galaxy-central: greg: Phase 2 of the tool dependency package installation framework rewrite: 1) rename the RecipeManager class to be the StepManager class and add a new TagManager class, both of which are contained in the recipe_manager.py module. 2) Add appropriate new classes for handling recipe tag sets to a new tag_handler.py module. Add a new InstallManager class with functions for installing tool dependencies. Eliminate the use of fabric_util.py and install_util.py.